Box-strapping table



April 20 1926.

H. DE HAVEN BOX STRAPPING TABLE Filed Nov. e, 1923 2 Shafts-Sheet 1' YINVENTOR.

-4 H HUGH DE HHVEN- BY s xA huq- ATTORNEY A ril 20 ,1926. 1 v H. DEHAVEN BOX STRAPPING TABLE Filed Nov. 6, 1923 2 Sheets-Sheet 2 INVEN TOR.HUGH DE HHVEN A TTORNEY UNITED STATES PATENT OFFICE.

HUG-H DE I-I AVEN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOB COMPANY, OFSAN FRANCESCO, CALIFORNIA.

To TI-I'i MAcHiNE BOX-STRAPIING TABLE.

To (ZZZ whom it may concern:

Be it known that 1, HUGE: DE HAVEN,

a citizen of the United States of America,

, in is a specification.

his invention relates to improvements in box strapping tables, theprincipal object of which is to produce a table upon which a strappingmachine is balanced so as rest upon the top of a box to be strapped whenin one position and to be raised above the level of the box when thestrapping machine is in another position. 7

Another object is to produce a deviceof this character which may beemployed with any type of strapping machine without materially alteringthe construction of the machine.

Another object is to produce a device which is capable of being adjustedto accommodate for various sizes of boxes and methods of strappingboxes.

still further object is to construct a device of this character which issimple in construction, cheap to manufacture and well within thepurchase price of the average user. 3

Other objects and advantages will be apparent during the course of thefollowing description.

in the accompanying drawings forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same, I

Figure l is a side elevation of Figure 3,

Figure 2 is a fragmentary rear elevation of Figure 1,

Figure 3 is a top plan view of Figure 1,

Figure 4 is a diagrammatic illustration of the principle of operation,and

Figure 5 is a cross sectional view showing a modified means for shiftingthe balance of the supporting arm.

In the usual strapping of boxes, a strapping machine is placed upon oneend of the box, a. wire placed about the box and connected to themachine in such a manner that the wire may be stretched, twisted and theends cut off after which the machine is moved ofi of the box and anotherbox placed in position for strapping. This necessitates the lifting andreplacing of the machine upon the box with each strapping opera tion,resulting in the operator lifting many pounds each day, which ise-liminatedby'the use of my improved strapping table wherein the machineis secured to the end of a supporting arm, which supporting arm ispivotally mounted above the level of the top of the box to be operatedupon.

In the accompanying drawings wherein for the purpose oi illustration isshown a preferred embodiment of my invention, the numerals 5 and 6 referto parallel spaced angle iron members supported at a suitable pointabove the ground as by legs 7 and 8, which are braced as shown at 9, l1and 12. These parallel members serve to support a plurality of rollers13. It is of course understood that a fiat table top would serve equallyas well as the rollers.

Secured at a suitable point on the table is an upright channel member 14which has mounted within the channel a sliding plate 16 having a slot 17therein, through which passes an adjusting bolt 18. This plate car'-ries upon its upper end a pivot pin 19 to which a plate 21 is pivotallysecured. This plate is provided with upstanding bolts 22 and 28, whichextend through slots 24 and 26 formed in a supporting arm 27. Thissupporting arm has slidably secured at one end a counterweight 28, whichcounterweight is adjustably locked to the bar as by a lock-bolt 29 Abox-strapping machine 30 having a substantialiy rectangular base plate31 is pivotally secured as by a pivot bolt 38 to the opposite end ofthis supporting arm. stop 39 is also formed upon this arm which isadapted to contact the wire-tying'machine base so as to prevent rotarymovement in one direction;

By viewing Figure 3, it will be noted that the corners of the tyingmachine base are out upon an angle, which is common in most machines. Inorder to guide a box to be strappeo, to a correct position in thestrapping machine, I have provided a guide member 41 having bent ends 42and 43. This guide member is adjustably held by parallel rods 44 and 46,which extend 1 through brackets 47 and 48 which have thumb-nuts 49therein.

The operation of my device is as follows Assuming that a box has beenstrapped Lil with a wire A (see Figs. 1 and 8), the machine will thenbein the position shown in full lines in Figure 3. By now sliding the boxto the dotted line position of this figure, the machine will be causedto move to the dotted line position of this figure, which will result inthe supporting arm 27 moving to its dotted line position of Figure 1 assoon as the corner of the machine has moved from beneath the wire A. Thereason for this supporting arm moving to the dotted line-position ofFigure l'may be specifically explained by viewing Figure 4 where thepoint B represents the fulcrum point of the supporting arm, the arrow Cthe downward pressure of the counter-weight, the arrow D the downwardpressure of the machine when in its full line position of Figure 3, andthe arrow E the downward pressure exerted by the machine when in itsdotted line position of Figure 3. This movement is also illustrated inthe cross lines of Figure 4, wherein the line DF represents thesupportin arm, the line GH the fulcrum, the point I the counter-weight,the line JK the position of the machine with respect to the fulcrum,when the machine is in operating position and the line LM the positionof the machine when swung into inoperative position as noted by thedotted lines on this diagram. It will thus be seen that the weight ofthe machine moves from the point N to the point 0, thus resulting in anunbalanced condition and al lowing the counter-weight I to lift thesupporting-arm and its attached machine.

In the modified form of Figure 5, the roller 51 is supported in a yoke52 mounted upon the pivot 19 of the machine and this yoke carries aslideway 53 through which the arm 27 is adapted to slide. Pins 54-. and56 are secured to the arm so as to prevent excessive movement thereof.With this modified construction the machine is moved directly backwardin order to accomplish the over-balancing by the counter-weight and ispulled forward to cause the overbalancing by the machine so as to bringthe machine into contact with the top of the box to be strapped.

It will thus be seen that I have devised a table having a supporting armupon which a machine is attached, which supporting arm may be broughtinto and out of contact with the top of a box by moving the point ofbalance of the supporting arm toward or away from the fulcrum point.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example-of the same, and thatvarious changes in theshape, size and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claims.

Having thus described my invention, I claim 1. In a box strapping table,the combination with a work support, of'supporting means positionedabove the work support, a plate pivoted to said supporting means, an armadjustably secured to said plate, a coui'iter-weigh't positioned on saidarm at a point outside the plane of said work support, a wire-tyingmachine positioned on the opposite end of said arm from saidcounter-weight, whereby movement of said machine out of operativeposition will cause a tipping of said'arm away from said work support.

2. In a box strapping table, the combination with a work support, of anarm pivot ally supported thereabove, a counter-weight secured to saidarm on one side of the pivotal point of said arm, means on said arm onthe opposite side of the pivotal point from said counter-weight forsecuring a. wire-tying machine whereby the wiretying machine is movedinto and out of operative position for causing a tipping actuation ofsaid arm, for the purpose specified.

3. In a package tying device, a support, a counter-balanced leverfulcrumed on said support and a wire-tying machine pivotally mounted onsaid lever, movement of tying machine about its pivotal support servingto unbalance the lever whereby the tying machine is gra-Vitally raised.

In testimony whereof I aiiix my signature.

HUGH DE HAVEN.

